Battery pack

Abstract

The utility model relates to the technical field of energy storage devices, in particular to a battery pack which comprises a slave plate assembly, a male plug terminal, a busbar and a battery cell, the slave plate assembly comprises a slave plate and a female plug terminal, the busbar is fixed to a pole of the battery cell, the male plug terminal is fixed to the busbar, and the female plug terminal is fixed to the slave plate assembly. And the plugging female terminal is electrically connected to the slave plate, and the plugging female terminal is plugged with the plugging male terminal. The utility model aims to provide a battery pack aiming at at least one technical problem related in the background technology.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and in particular to a battery pack. Background Art

[0002] With the rapid increase in the number of cars in my country, traditional fuel vehicles have become one of the main sources of environmental pollution in my country. Electric vehicles have become an important industry for the development of new energy vehicles due to their energy-saving and environmentally friendly characteristics. The battery management system in the battery pack is mainly connected to the PCB circuit and the wiring harness through the plug-in. The male end of the plug-in is welded on the PCB board, and the female terminal is crimped and connected to the FPC module to collect voltage. The process is complicated, there are many connectors, and it is easy to have problems such as terminal crimping virtual connection and terminal expansion foreign matter. In addition, the wiring harness FPC transfer line is long and the cost is high. Utility Model Content

[0003] The purpose of the present application is to provide a battery pack in view of at least one technical problem involved in the background technology.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] The present application provides a battery pack, including a slave board assembly, a plug-in male terminal, a bus and a battery cell, the slave board assembly includes a slave board and a plug-in female terminal, the bus bar is fixed to the pole of the battery cell, the plug-in male terminal is fixed to the bus bar, the plug-in female terminal is electrically connected to the slave board, and the plug-in female terminal is plugged into the plug-in male terminal.

[0006] Optionally, the plug-in female terminal is welded to the slave board.

[0007] The beneficial effect of this technical solution is that in the prior art, in order to realize the crimping of the plug-in female terminal and the wire harness, it is necessary to open a hole in the terminal. The axial dimension of the hole is relatively large, and foreign matter may be retained during processing, affecting product quality. In the embodiment of the present application, the plug-in female terminal is welded to the slave plate, so the plug-in female terminal and the slave plate do not need to open a hole in the plug-in female terminal, thereby avoiding the possibility of foreign matter remaining in the hole and improving product quality.

[0008] Optionally, a first plug interface is formed on the slave plate, the plug-in female terminal includes a main body plate and a clamping plate pair fixed to the main body plate, a second plug interface is formed on the main body plate, the clamping plate pair includes a first clamping plate and a second clamping plate, in a first direction, the first clamping plate is located on one side of the second plug interface, the second clamping plate is located on the other side of the second plug interface, the plug-in male terminal passes through the second plug interface, the plug-in male terminal is located between the first clamping plate and the second clamping plate, the first clamping plate and the second clamping plate are both in pressure contact with the plug-in male terminal, and the first direction is parallel to the main body plate.

[0009] The beneficial effect of this technical solution is that it enables the male terminal to be clamped by the clamping plate pair after passing through the first plug interface and the second plug interface, thereby improving the reliability of the connection between the male terminal and the female terminal.

[0010] Optionally, the plug-in female terminal includes two clamping plate pairs, and the two clamping plate pairs are arranged in a second direction, and the second direction is the length direction of the second plug interface.

[0011] The beneficial effect of this technical solution is that: in this way, the plug-in male terminal is clamped by at least two clamping plates, so that the reliability of the connection between the plug-in male terminal and the plug-in female terminal is further increased.

[0012] Optionally, the first clamping plate includes a first arc-shaped portion, the second clamping plate includes a second arc-shaped portion, and a convex side of the first arc-shaped portion is opposite to a convex side of the second arc-shaped portion.

[0013] The beneficial effect of this technical solution is that in this way, the first arc portion and the second arc portion can not only generate a large pressure between the protruding side and the plug-in male terminal to more reliably limit the plug-in male terminal, but also the first arc portion and the second arc portion can also guide the plug-in of the plug-in male terminal, thereby improving assembly efficiency.

[0014] Optionally, the plug-in female terminal also includes a connecting plate, which is a U-shaped plate, and a port of the connecting plate is arranged facing the slave plate, one side of the port is a first end connected to the slave plate, and the other side of the port is a second end fixedly connected to the main plate.

[0015] The beneficial effect of this technical solution is that errors are inevitable during the processing and assembly of the plug-in female terminal and the plug-in male terminal. By providing a U-shaped connecting plate, when the plug-in female terminal and the plug-in male terminal are plugged in, the connecting plate can be appropriately deformed with the plug-in female terminal and the plug-in male terminal to adapt to the existing tolerances, thereby improving the assembly efficiency.

[0016] Optionally, the plug-in female terminal includes two connecting plates, and the two connecting plates are located on both sides of the main body plate in a one-to-one correspondence in the first direction.

[0017] The beneficial effect of this technical solution is that the use of two connecting plates can make the plug-in female terminal and the slave plate more firmly connected, and the two connecting plates can generate a larger elastic force when adapting to the plug-in tolerance of the plug-in female terminal and the plug-in male terminal, thereby increasing the pressure between the plug-in female terminal and the plug-in male terminal, thereby improving the reliability of the plug-in.

[0018] Optionally, the battery pack provided in the present application comprises a plurality of battery cells, the bus comprising a first connection portion, a bending buffer portion and a second connection portion connected in sequence, a first pole connection hole being formed on the first connection portion, the first pole connection hole being connected to a terminal of one of the battery cells, a second pole connection hole being formed on the second connection portion, the second pole connection hole being connected to a terminal of another battery cell, and the bending buffer portion being bent and extended from the first connection portion to the second connection portion.

[0019] The beneficial effect of this technical solution is that: in this way, the first pole connecting hole on the first connecting part can be used to weld to the pole of one battery cell, and the second pole connecting hole on the second connecting part can be used to weld to the pole of another battery cell, and the bending buffer part is located between the first connecting part and the second connecting part, and is used to absorb tolerance when the battery cells collide.

[0020] Optionally, the male plug-in terminal and the busbar are integrally formed.

[0021] The beneficial effect of this technical solution is that it reduces the welding or crimping process between the plug-in male terminal and the busbar, thereby avoiding the problem of false connection caused by poor welding or crimping.

[0022] Optionally, a male terminal anti-misalignment positioning hole is formed on the first connecting portion, and the plug-in male terminal is fixed to the second connecting portion.

[0023] The beneficial effect of this technical solution is that before installing the busbar and the plug-in male terminal as one body, the position of the plug-in male terminal can be determined based on the male terminal's anti-mistake positioning hole, so that the plug-in male terminal is not easily installed in the wrong position.

[0024] The technical solution provided by this application can achieve at least one of the following beneficial effects:

[0025] The battery pack provided in the present application replaces the female terminal crimping wiring harness in the prior art that is transferred to the FPC module to collect voltage by electrically connecting the plug-in female terminal to the slave board, thereby eliminating the wiring harness and FPC module, and has a simple structure, low failure rate, simple assembly process, high efficiency and low cost.

[0026] The additional technical features and advantages of the present application will be more clearly explained in the following description, or can be understood through the specific practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the specific implementation methods of the present application, the following is a brief introduction to the drawings required for the description of the specific implementation methods. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of an exploded structure of an implementation manner of a battery pack provided in an embodiment of the present application;

[0029] Figure 2 Another exploded structural schematic diagram of an implementation manner of a battery pack provided in an embodiment of the present application;

[0030] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0031] Figure 4 A schematic diagram of a partial structure of a battery pack according to an embodiment of the present application;

[0032] Figure 5 A schematic diagram of a side cross-sectional structure of a certain position of a battery pack provided in an embodiment of the present application;

[0033] Figure 6 for Figure 5 A local enlarged schematic diagram of point B in the middle.

[0034] Reference numerals:

[0035] 01. Module cover; 02. Bolts;

[0036] 03. From the board; 04. Battery cell shell;

[0037] 05. Install studs from the board; 06. Busbar;

[0038] 07. Plug in male terminal; 08. Battery cell;

[0039] 09. Plug in female terminal; 10. First clamping plate;

[0040] 11. Connecting plate; 13. Main body plate;

[0041] 14. Male end anti-mistake positioning hole; 15. First connecting part;

[0042] 16. First pole connection hole; 17. Bending buffer portion;

[0043] 18. Second pole connection hole; 19. Second connection portion;

[0044] 20. Second clamping plate. DETAILED DESCRIPTION

[0045] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0046] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] like Figures 1 to 6 As shown, the present application provides a battery pack, including a slave board assembly, a plug-in male terminal 07, a bus 06 and a battery cell 08, the slave board assembly includes a slave board 03 and a plug-in female terminal 09, the bus 06 is fixed to the pole of the battery cell 08, the plug-in male terminal 07 is fixed to the bus 06, the plug-in female terminal 09 is electrically connected to the slave board 03, and the plug-in female terminal 09 is plugged with the plug-in male terminal 07.

[0049] The battery pack provided in the present application replaces the female terminal crimping wiring harness in the prior art that is transferred to the FPC module to collect voltage by electrically connecting the plug-in female terminal 09 to the slave board 03, thereby removing the wiring harness and the FPC module, and has a simple structure, low failure rate, simple assembly process, high efficiency and low cost.

[0050] Optionally, the plug-in female terminal 09 is welded to the slave board 03. In the prior art, in order to realize the crimping of the plug-in female terminal 09 and the wire harness, a hole needs to be opened in the terminal. The axial dimension of the hole is relatively large, and foreign matter may be retained during processing, affecting the product quality. In the embodiment of the present application, the plug-in female terminal 09 is welded to the slave board 03, so that the plug-in female terminal 09 and the slave board 03 are connected without opening a hole in the plug-in female terminal 09, thereby avoiding the possibility of foreign matter remaining in the hole and improving the product quality.

[0051] Optionally, a first plug interface is formed on the slave plate 03, the plug female terminal 09 includes a main body plate 13 and a clamping plate pair fixed to the main body plate 13, a second plug interface is formed on the main body plate 13, the clamping plate pair includes a first clamping plate 10 and a second clamping plate 20, the first clamping plate 10 is located on one side of the second plug interface in the first direction, the second clamping plate 20 is located on the other side of the second plug interface, the plug male terminal 07 passes through the second plug interface, the plug male terminal 07 is located between the first clamping plate 10 and the second clamping plate 20, the first clamping plate 10 and the second clamping plate 20 are both in pressure contact with the plug male terminal 07, and the first direction is parallel to the main body plate 13. This allows the plug male terminal 07 to be clamped by the clamping plate pair after passing through the first plug interface and the second plug interface, thereby improving the reliability of the connection between the plug male terminal 07 and the plug female terminal 09.

[0052] Optionally, the plug female terminal 09 includes two clamping plate pairs, which are arranged in a second direction, and the second direction is the length direction of the second plug interface. In this way, the plug male terminal 07 is clamped by at least two clamping plate pairs, further increasing the reliability of the connection between the plug male terminal 07 and the plug female terminal 09.

[0053] Optionally, the first clamping plate 10 includes a first arc-shaped portion, and the second clamping plate 20 includes a second arc-shaped portion, and the convex side of the first arc-shaped portion is opposite to the convex side of the second arc-shaped portion. In this way, the first arc-shaped portion and the second arc-shaped portion can not only generate a large pressure between the convex side and the plug-in male terminal 07 to more reliably limit the plug-in male terminal 07, but also the first arc-shaped portion and the second arc-shaped portion can guide the plug-in male terminal 07, thereby improving the assembly efficiency.

[0054] Optionally, the plug-in female terminal 09 further includes a connecting plate 11, which is a U-shaped plate, and a port of the connecting plate 11 is arranged facing the slave plate 03, one side of the port is a first end connected to the slave plate 03, and the other side of the port is a second end fixedly connected to the main plate 13. Errors are inevitable during the processing and assembly of the plug-in female terminal 09 and the plug-in male terminal 07. By providing a U-shaped connecting plate 11, when the plug-in female terminal 09 is plugged with the plug-in male terminal 07, the connecting plate 11 can be appropriately deformed with the plug-in female terminal 09 and the plug-in male terminal 07 to adapt to the existing tolerances, thereby improving assembly efficiency.

[0055] Optionally, the plug female terminal 09 includes two connecting plates 11, and the two connecting plates 11 are located one by one on both sides of the main plate 13 in the first direction. The use of two connecting plates 11 can make the plug female terminal 09 and the slave plate 03 more firmly connected, and the two connecting plates 11 can generate a larger elastic force when adapting to the plug-in tolerance of the plug female terminal 09 and the plug male terminal 07, thereby increasing the pressure between the plug female terminal 09 and the plug male terminal 07, thereby improving the reliability of the plug-in.

[0056] Optionally, the battery pack provided in the embodiment of the present application includes a plurality of battery cells 08, the busbar 06 includes a first connection portion 15, a bending buffer portion 17, and a second connection portion 19 connected in sequence, a first pole connection hole 16 is formed on the first connection portion 15, the first pole connection hole 16 is connected to a terminal of the battery cell 08, a second pole connection hole 18 is formed on the second connection portion 19, the second pole connection hole 18 is connected to a terminal of another battery cell 08, and the bending buffer portion 17 is bent and extended from the first connection portion 15 to the second connection portion 19. In this way, the pole of one battery cell 08 can be welded through the first pole connection hole 16 on the first connection portion 15, and the pole of another battery cell 08 can be welded through the second pole connection hole 18 on the second connection portion 19, and the bending buffer portion 17 is located between the first connection portion 15 and the second connection portion 19, and is used to absorb tolerance when the battery cell 08 collides.

[0057] Optionally, the male plug-in terminal 07 is integrally formed with the busbar 06. This reduces the welding or crimping process between the male plug-in terminal 07 and the busbar 06, thereby avoiding the problem of false connection caused by poor welding or crimping.

[0058] Optionally, a male terminal anti-mistake positioning hole 14 is formed on the first connection portion 15, and the plug male terminal 07 is fixed to the second connection portion 19. In this way, before the busbar 06 and the plug male terminal 07 are installed and formed integrally, the position of the plug male terminal 07 can be determined according to the male terminal anti-mistake positioning hole 14, so that the plug male terminal 07 is not easily installed in the wrong position.

[0059] In the embodiment of the present application, the slave plate assembly also includes a module cover 01 and a plurality of bolts 02, the battery pack also includes a battery cell shell 04 and a plurality of slave plate mounting studs 05 installed on the battery cell shell 04, the module cover 01 covers the upper surface of the slave plate 03, and the module cover 01 and the slave plate 03 are fixed together on the battery cell shell 04 through the one-to-one connection between each bolt 02 and each slave plate mounting stud 05, and each battery cell 08 is installed in the battery cell shell 04.

[0060] In the embodiment of the present application, each battery cell 08 is arranged in a single row, and poles are output on the same side of the top of the battery cell 08. The slave board 03 is arranged on the top of each battery cell 08. The battery cell 08 module includes a battery cell shell 04 and a battery cell shell 04. The battery cell 08 module adopts the MEB battery cell 08 single-row arrangement, and poles are output on the same side of the top. The bus 06 welds the battery cell 08 poles and is located in the same plane; the slave board 03 is arranged on the top of the battery cell 08 module to facilitate the overall collection of voltage and temperature signals; the slave board 03 is the same length as the battery cell 08 module, and each collection point on the slave board 03 is collected nearby to the bus 06, and plug-ins are arranged at both ends of the slave board 03 to improve communication security.

[0061] The relationship between the number of module cells 08 (n) and the AFE acquisition channel (f) is as follows:

[0062] f≥n; one AFE acquisition channel is greater than the number of battery cell 08 strings to meet the acquisition requirements of battery cell 08 voltage;

[0063] fn≥2; no more than 2 AFE acquisition channels are reserved to achieve maximum utilization efficiency.

[0064] The voltage collection connection mode of slave board 03 and busbar 06 is plug-in mode. The plug-in male terminal 07 is integrated on busbar 06, and the plug-in female terminal 09 is welded on slave board 03. The connection position of the collection terminal plug-in female terminal 09 and the plug-in male terminal 07 adopts two pairs of crimping points to ensure sufficient crimping surface and holding force, and the plug-in female terminal 09 covers the plug-in male terminal 07 on both sides in the plane installation, and 1 / 4 of the space is reserved to absorb the installation tolerance; the plug-in female terminal 09 is symmetrically inserted into the slave board 03 and welded on both sides to ensure firm fixation. The slave board 03 and the module cover 01 are fixed to the module end plate by four bolts 02, and the entire module is integrated together.

[0065] There are three holes on the busbar 06, two of which are pole connection holes, and the other is a male terminal anti-mistake positioning hole 14; a bending buffer zone is opened in the center of the busbar 06 to ensure the expansion absorption tolerance of the battery cell 08; the plug-in male terminal 07 is integrated on the busbar 06 and formed in one piece, reducing the welding or crimping process and avoiding the problem of false connection caused by poor welding or crimping.

[0066] The module cover 01 mainly plays the role of protecting the module. It is installed on the module end plate together with the slave plate 03. It is made of plastic and is integrally formed by vacuum molding. The main body is formed with concave and convex surfaces. It is in contact with the slave plate 03 on all sides to enhance the structural strength.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: It includes a slave board assembly, a plug-in male terminal, a busbar and a battery cell. The slave board assembly includes a slave board and a plug-in female terminal. The busbar is fixed to the pole of the battery cell, the plug-in male terminal is fixed to the busbar, the plug-in female terminal is electrically connected to the slave board, and the plug-in female terminal is plugged into the plug-in male terminal.

2. The battery pack according to claim 1, characterized in that: The plug-in female terminal is welded to the slave board.

3. The battery pack according to claim 1, characterized in that: A first plug interface is formed on the slave plate, the plug-in female terminal includes a main body plate and a clamping plate pair fixed to the main body plate, a second plug interface is formed on the main body plate, the clamping plate pair includes a first clamping plate and a second clamping plate, the first clamping plate is located on one side of the second plug interface in a first direction, the second clamping plate is located on the other side of the second plug interface, the plug-in male terminal passes through the second plug interface, the plug-in male terminal is located between the first clamping plate and the second clamping plate, the first clamping plate and the second clamping plate are both in pressure contact with the plug-in male terminal, and the first direction is parallel to the main body plate.

4. The battery pack according to claim 3, characterized in that: The plug-in female terminal includes two clamping plate pairs, and the two clamping plate pairs are arranged in a second direction, and the second direction is the length direction of the second plug-in interface.

5. The battery pack according to claim 4, characterized in that: The first clamping plate includes a first arc-shaped portion, and the second clamping plate includes a second arc-shaped portion, and a convex side of the first arc-shaped portion is opposite to a convex side of the second arc-shaped portion.

6. The battery pack according to claim 3, characterized in that: The plug-in female terminal also includes a connecting plate, which is a U-shaped plate. The port of the connecting plate is arranged facing the slave plate, one side of the port is a first end connected to the slave plate, and the other side of the port is a second end fixedly connected to the main plate.

7. The battery pack according to claim 6, characterized in that: The plug-in female terminal includes two connecting plates, and the two connecting plates are located on both sides of the main body plate in a one-to-one correspondence in the first direction.

8. The battery pack according to any one of claims 1 to 7, characterized in that: The busbar comprises a plurality of battery cells, wherein the busbar comprises a first connection portion, a bending buffer portion and a second connection portion which are connected in sequence, wherein a first pole connection hole is formed on the first connection portion and the first pole connection hole is connected to a terminal of one of the battery cells, and a second pole connection hole is formed on the second connection portion and the second pole connection hole is connected to a terminal of another battery cell, and the bending buffer portion is bent and extends from the first connection portion to the second connection portion.

9. The battery pack according to claim 8, characterized in that: The male plug-in terminal and the busbar are integrally formed.

10. The battery pack according to claim 9, characterized in that: A male terminal anti-misalignment positioning hole is formed on the first connecting portion, and the plug-in male terminal is fixed to the second connecting portion.

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